A little 2nd grader came home from school and told his mom that he learned 2 + 2

the son-of-a-bitch is 4 and that 4 + 4 the son-of-a-bitch is 8. His mom said,

that's what you learned today and her son said yes. So the mother went to school

and asked his teacher if she taught her son that 2 + 2 the son-of-a-bitch

is 4 and that 4 + 4 the son-of-a-bitch is 8. The teacher looked surprised and said no...no...no...

It's 2 + 2 the sum of which is 4.